I am new to electronics but I do fix appliances to earn $$ on the side which is why I'd like to take this up to the next level. I come across customers who need their PCB or PCBs repaired. I've been successful with some (simple stuff like capacitors, resistors, etc) but I have no way of testing them other than to re install back into appliance (refridge, dryer, washer, etc...). Can I purchase a good eprom programmer that does MCUs and CPLDs, find good ones, upload them into the programmer and fix any future bad one I come across? Also, how do I test the IC? Buy an actual IC tester? If so, which one is relatively cheap ($1k or less) that will do the job? Thanks in advance for everyone's help!!!!!